39898743 has 4 divisors (see below), whose sum is σ = 53198328. Its totient is φ = 26599160.

The previous prime is 39898741. The next prime is 39898757. The reversal of 39898743 is 34789893.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 39898743 - 2¹ = 39898741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39898741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6649788 + ... + 6649793.

It is an arithmetic number, because the mean of its divisors is an integer number (13299582).

Almost surely, 2^39898743 is an apocalyptic number.

39898743 is a deficient number, since it is larger than the sum of its proper divisors (13299585).

39898743 is a wasteful number, since it uses less digits than its factorization.

39898743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13299584.

The product of its digits is 1306368, while the sum is 51.

The square root of 39898743 is about 6316.5451791308. The cubic root of 39898743 is about 341.7063670967.

The spelling of 39898743 in words is "thirty-nine million, eight hundred ninety-eight thousand, seven hundred forty-three".